Necticut



(NU'ModelA 2 Sheets-Sheet 1.

W. D. DOREMUS.

PADLOGK.

No. 402,663. Patented-May 7, 1889.

@M 2m @www gm ymjw.

(No Modem y 2 sheets-sheet 2.

W. D. DOREMUS.

PAIHIOGK.Y

No. 402,663. Patented May 7, 1889. 5

@men/cof @VL/umm,

www ,Ur/femm.

. m @531 MMMQQ L m UNITED STATES .PATENT OFFICE.

WILLARD D. DOREMUS, OF VASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO THECORISIN CABINET LOCK COMPANY, OF NEV.BRITAIN, CON- NECTICUT.

PADLOCK.

SPECIFICATION forming part of Letters Patent No. 402,663, dated May '7,1889.

Application led .Tammy 18, 1888. Renewed Ianuary 29, 1889. Serial No.297,982. (No model.)

To @ZZ whom it may concern:

Be it known that I, WILL/TRD D. DoREMUs, acitizen of the United Statesof America, residing at Vashingtomin the District of Columbia, haveinvented certain new and useful Improvements in Padlocks; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of'referencemarked thereon, which form a part of this specification.

My invention has relation to improvements in padlocks; and the object isto improve eX- isting lock mechanisms and increase their securityagainst false keys and knavish manipulation.

My invention consists in the novel construction of parts and theircombination, as will be hereinafter fully described, and specially asthe same is particularly pointed out and claimed herein.

I have fully and clearly pointed out my improvements in the accompanyingdrawings, wherein- Figure l is an elevation of the padlock with one ofthe plates removed, showing the mechanism in locked relation. Fig. 2 isa similar view showing the mechanism in unlocked relation. Fig. 3 is asimilar view showing the tumblers removed and the key inserted, the lugof the detent-piece being shown as lodged against the end of the dog.Fig. 4 isa similar view showing the position of the elements when astraight key is inserted. Fig. 5 is a detail of the dog. Fig. 6 is adetail of the detent-piece. Fig. 7 is a detail view of one of thetumblers, showing the spring bent to act to release the dog. Fig. S is adetail of one of the tumblers, and Fig. 9 is a perspective of the key.

In the drawings the similar notations used in the different iiguresdesignate like parts, and, reference being had thereto, A designates thelock-case consisting of face plates a, one only of which is shown,connected by a rimpiece, 1, in which are formed the usual open ings, 23, to take the hinge end and nose of the shackle, and having a key-hole,l). In the casing is pivoted the shackle 4, formed on its free end withnotch 5, to engage the catch end of the dog. The shackle is pivotallymounted on a rivet, 6, and this rivet, in connection with thosesupporting the dog, the tumblers, and the stop of the detent, holds thecasing tightly and securely together. In the heel of the shackle is ahole, 7, in which engages one arm of a spring, 8, mounted on a stud orrivet, 9, the other arm of the spring being lodged against thetumblerrivet, as shown, the purpose being that when the shackle isreleased Yfrom the dog the spring will lift and throw the shackle back,so that the lock may be removed from the staple or other object to whichit is attached.

B designates the dog, pivoted on a rivet, 10, in the casing. This dog isformed with a notch, 11,to engage the nose of the shackle, and has anarm, 12, which is engaged by a spring on one of the tumblers, and ismoved in engagement with the notches ofY the tumblers when they align.On the lower eXtension of the dog is formed a lug, 13, to engage thenotches of the tumblers when in alignment, and in the edge of this 'lug13 is a groove, 14, to receive a flange of the lug on the detent-piece.

In the casing is rigidly secured a key-guard, 15, arranged with its facenearest the keyhole, on an incline, to permit the end of the key toslide in freely and be guided into the space between its upper end andthe stop and guide-pin, against which the arm of the detent rests. Thisguard also serves as a rest to hold the tumblers from falling down toofar.

C designates the detent,-piece. This'is piv- IOO its support with itsgreatest diameter in the direction of the lug 13, as indicated in dottedlines, and so that when a straight key is inserted the arm 19 of thedetent-piece is moved back, and the lug 17 thus moved down against theface end of the lug13 of the dog, stopping the dog from entering thenotches of the tumblers, although they might be moved into alignment bythe key. Across the face of the lug 17 is a groove, 18, leaving a flangeon the outer edge of the lug, the purpose being to permit the ange ofthe lug 17 to move down under the groove 14. of the lug 13 on the dog,when the detent is moved by the insertion of the key, and this alsopermitting the arm 19 of the detent to be pushed back and the detent tobe rotated far enough for the key to be withdrawn. Below the lug 17 is anotch, c, in which the lug 13 of the dog enters, when the lock isunlocked, as in Fig. 2, and specially as shown in Fig. 3 of thedrawings. The detent-piece is also formed with an arm, 19, carried downto the rim of the case and terminating in an angular lng, 20, the faceend of which sets at an incline across the key-hole of the lock,substantially as seen in the drawings. A spring, 21, is fixed in thedetent and operates to always throw it in normal position, and to limitthe movement of the detent a pin, 22, is fixed in the case. The pin, 22,also serves as a key-guide in connection with the keyguard 15. Thespring 21 may bear against the rivet 23, as shown. A lkey-seat, 24, isformed in the under side of the detentpiece, into which the end of thekey projects.

D designates the tumblers, which are pivoted on the rivet 23, and are ofthe usual form, as shownin Figs. 7 and 8, the springs being arranged tobear backward against the rim of the case, except that in one instance Iutilize the spring of one, as 25, to throw the dog fromengagement withthe shackle when the lock is unlocked by arranging the free end of thespring to bear upon the arm 12 of said dog, as seen in Figs. 1 and 2 ofthe drawings.

E designates the key having the requisite number of steps 26 to engagethe tumblers, and formed with a notch, 27, bent or struck in the shank,the purpose of the notch being to provide a seat for the free end of thearm of the detent-piece to rest in after the key is inserted and thetumblers are lifted, and thus permit the lug 13 on the dog to engage thenotches of the tumblers and that in the detent.

The parts may be assembled in the case by arranging the shackle on itsrivet7 then adjusting the spring which lifts it in place, then puttingthe dog on its rivet, then arranging the detent -piece in position, thenmounting the tumblers with the springs bearing as shown, and thenadjusting the cover or face-plate on and riveting it in the usualmanner. The lock is manipulated by inserting the key and pressing it inuntil the end of the arm of the detent moves into the notch of the key,when by continued pressure the tumblers are lifted to align and the dogreleased and thrown with its lug into the notches. The key may bewithdrawn when the lock is unlocked, and then the parts thrown in lockedposition by simply forcing the nose of the shackle into the case andunder the catch of the dog.

1. In a padlock, the combination, with the tumblers and the dog, of adetent-piece, C, pivoted in the casing, and formed with a lug to engagethe end of the dog and prevent it from engaging the notches of thetumblers, and an arm terminating in an inclined end piece to set acrossthe key-hole of the lock, substantially as and for the purpose stated.

2. The combination, with the casing, of the key-guard and tumbler-rest15, arranged at an incline over the keyhole, the tumblers pivoted torest on the guard and rest 15 in their downward movement, and thedetentpiece pivoted on the lock and formed with an arm adapted to setacross the key-hole, substantially as and for the purpose specified.

3. The combination, with the casing having the shackle, of the springactuated dog having a lug to engage the notches of the tumblers, thetumblersLa detent-piece pivoted in the casing and formed with a lug toengage the said lug of the dog and an arm terminating in an angularpiece to set across the keyhole, and a key formed with an angle in itsshank, whereby the tumblers may be lifted and the detent moved out ofengagement with the dog, substantially as described.

In testimony whereof I afi-"1X my signature in presence of twowitnesses.

VfIIJLAR-D I). DOREMUS.

lVitnesses n JAMES T. Giens, 1I. A. ROBINSON.

